What is difference between CGPA and GPA?

Grades of subjects passed (no lab/project) is called GPA. GPA is provided for both Section A and Section B separately.

Grades of all subjects, lab and project work combined (Section A + Section B) is called CGPA.

To know GPA/CGPA calculation method,
click at http://www.amiestudycircle.com/grading_system.htm

To convert GPA/CGPA to percentage,
click at http://www.amiestudycircle.com/percentage.htm